GT4WordSList (word-list-sorted.h)
	*Iterate over sequential list of words
	get_first_word()
	get_next_word()
	idx
	word
	count

	GT4WordSArray (word-array-sorted.h)
		*Get word by index
		get_word(idx)

GT4WordDict (word-dict.h)
	*Get value by word
	lookup(word)
	value

GT4FileArray (file-array.h)
	*Get file and subsequence data
	get_file(idx)
	get_sequence(idx)
	file_name
	file_size
	n_sequences
	name_pos
	name_len
	seq_pos
	seq_len

GT4SequenceSource (sequence-source.h)
	*Read sequence data sequentially
	open()
	read()
	close()
	open
	eof
	error

GT4SequenceCollection (sequence-collection.h)
	*Access subsequences
	get_subsequence(idx)
	add_subsequence(name_pos, name_len)
	set_subsequence(idx, seq_pos, seq_len)
	name_pos
	name_len
	seq_pos
	seq_len
